Door-buffer.



D. F. OLIVER.

DOOR BUFFER. 7 APPLICATION FILED JUNK-1'5 1914.

1,172,037. Patented Feb. 15,1916.

1 i E By- W a I ATTORNEYS THB COLUMBIA PLANOGRA 0., WASHINGTON, D.

noo'roa FRANKLIN OLIVER, or oAKLAivn, CALIFORNIA.

Specification of Letters Patent.

. DOOR-BUFFER.

Patented Feb. 15, 19 16.

Application filed June 5, 1914 Serial N 0. 843,165.

To all whom it may concern: 7

Be it known that I, DOCTOR FRANKLIN OLIVER, a citizen of the United States, and a' resident of Oakland, in the county of Alameda and State of Oalifornia', have invented a new. andlmproved Door-Bufier, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved door buffer which is very simple and durable in construction, easily attached. to the door and wholly independent of the door lock, the door buffer being arrangedto permit the door to close gently on slamming the door thus preventing injury to'the door and door casing and reducing the shock incldent to the slamming of the door to a minimum.

In order to accomplish the desired result use is made of a brake mechanism, an oscil-' lating member, and means for actuating the said mechanism by the'said oscillating member on slamming the door, the said oscillating member oscillating free of the brake mechanism on closing the door with ordi-.

'- nary force.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

" Figure 1 1s a sectlonal side elevation of the door buffer as applied'to a door and door casing, the section being onthe line 1-1' of Fig. 3; Fig. 2 1s a plan view of the same with the striking mechanism on the door casing omitted; Fig. 3 is a sectional planview of the same; F1g.4 1s a cross section of the same; Fig. 5 is a. sectional plan view of the same-with the parts in working position on slamming the door; and Fig. 6 is a face View of the striker on the door casing.

The casing A of the door buffer is let in and fastened to the top rail of the door B,

' as plainly shown in the drawings, and on the casing A is held a vertically disposed pivot C on which is mounted to swing an actuating member D, preferably of L shape and having its forward end extending into -an opening A in the front plate of the easing A (see Figs. 1, 2 and 3). The forward end of the actuating member D is adapted to be engaged by a striking pin'E arrangedon the plate E secured to the'headjamb of the door casing B, as plainly indicated in Fig. 1. It will be noticed that when'the door is D is swung inwardly in the direction closed the free end of the actuating member of. the arrow a (see Figs. 3 and 5). V

On the pivot pin O is mounted to swing and to slide a movable brake member F operating in conjunction with a segmental brake member G fixed'in the casing A. The movable brake member F is preferably of U shape, thefactuating member D, andthe free ends F of the movable brake imember F are beveled (see Fig. 4) and adapted to movein frictional contact withthe beveled side edges G ofthe segmental faceof the fiXed brake member G. Normally the movablebrake member F hasits beveled edges F free of the beveled edges G of the fixed member G, but when the door is slammed the movable brake memberF is caused to slide radially and between its'side bars oscillates,

as hereinafter more fully describedto 'engage the beveled edges F with the beveled edges G. elongated slots F formed in the side bars of the movable brake member F'to allow the latter to slide in a radial direction. On the sidebars of the movable brake member F is secured apin H extending through a slot D formed in the forward end of the actuating member D, and the said pinI-I is pressed on by one end of a spring I held in the slot D and seated'at the forward end thereof, the spring having its outer portion coiled around a pin J attached to the free endfof the actuating member D. By the arrangement described the spring I is held in place in the slot D to press at all times against the pin'I-I. A spring K is connected at one end with the pivotal end ofthe actuating member D and the other end of the spring is attached to the fixed brake member G so as to hold the actuating member D normally in a forward position, as shown in Figs. 1, 2 and 3. 7 1

The operation is as follows: NVhen' the The pivot pin O extends through I door B-is closed with ordinary force and the swung in the direction of the arrow or against the tension of its spring K,andthe swinging motion of the actuating member D mg pin E then the actuating member D isactuating member D finally strikes thestrik fixedbrake member: Gr. When the door is opened the spring- K returns the actuating member ,D and the brake member F to-thel-r normal position shown in Figs. 1, 2 and 3.

When the door B is closed with more than ordinary force then the sudden impact of the. actuatingmember D on the striking pin E causes a sudden movement of the: actuating.

member D in the direction of the arrow a,

and in doing so the spring I is pressed, the

wall of the slot D of ,theactuating member D bears on and moves the pin H, and the movable brake member.F is not only caused 1 to swingwith the actuating member D but is also caused to slide radially in the direction toward the fixed" brake member G sothat the beveled edges F of the movable brake; member' Flfrictionally engagethe beveled edges G ofthe' fixed brake member G, and conse-.

quentlythe swinging movement of the mov able brake member F and that of the actuatingmember D in the-direction or: the arrow at is retarded bypth'e braking action pf the member F on the memberG.

j" the arrangement described the brake mechanism is brought int'oaact'ion'to cushion V the door in case the latter 1's.slammed:w1th

more than ordinary force, but! when'the door is" closed with ordinary'force'or speed then the brake mechanism remains inactive as the movableibrake member Fswings free relative to the fixed brake member G.

The pin J is} preferably adj ustably mounted in the actuating member D and for this purpose theouter end of-the pin is threaded (see Fig. 1) and screws in' the free end of the actuating member D. By

on heavy doors.

this arrangement the pin J can be screwed.

farther in when the buffer is used on light doors or outward when the bufferis used In. either case the pin J serves to limit the movement of the pin H relative to thepin .J to prevent the brake member F from too forceful engagement with the brake member .G.

Having thus-described my invention, I claim as new and desire to secure by Letters Patent 711A door buffer, comprising a brake mechanism having a. fixed member and a 7 mechanism having a fixedand a movable movable member mounted to swing, and

means foract'uating the said movable 1116111:- ber on slamming the door to move the same into engagement with the fixedmember, the

' said movable memberswingingfree of-the fixed member of the brakeflmechanlsm on.

closing'the doorwith ordinary force.

2L A- door bufier, comprising a brake member normally free of the said fixedmember an' oscillating 1member,,and means for moving thes'aid movable brake member by the said oscillating member into engagement with: the said 5 fixed brake member on. slamming thedoor.

- 3. A door butler, comprising a friction V ablebrake membenwith the said actuating,

her and a movable brakemeinber normall'yj "*ber and a movable brake member normally j mounted to swing freeot the said fiXedL brake member on closing the door with ordif- L nary; force, and means for engaging-the said movable brake memberl with the saidv fixedw brake member on slammingithe door.

4. A door bufier, comprising a friction brake having a fixed segmental brake mem-i c ber and famovable brake member mounted 575 to .swing' normally free of the said fined brake member, and an actuatingmembencontrolledby the closing ot thedoor and are; ranged/to allow thelsa-id oscillatingbra ke'. member to swing; free: of'the fixedQbrake18C member on closing the door qwithi ordinary force and to move the saidoscillating brake member into frictional engagement with the: said fixed brake memberonuslammingthec-r d'OOI'gQ i V 5. VA-door butter, comprising a friction: brake having a fixed segmental; brake meritber anda 'movablebralre member normally free of the said fixed brake? member andfl t adapted to engage, the same, the movable. brakeanember"beingj'capablaof swinging= c and slidingradially, aniv actuating membi 1 mounted toswing'o'n; the axis of theisa'i movable brake member and independentlyt i thereof-{strikingmeans adapted .to engag' the said actuatingzmemberr onclosingth cloor,:and means connectingthe saidlmov-e member to. move the .movable brake ZmeJm-Z ber radially into engagement withthe fiied brakemember on slammingthedoon 6; A door, buffer, comprising a" friction 1 brake having a' fixed segmental brake memebe-r and'iamovable brake membernormall' free of the. said fixed. brake membera adapted to engage the same, the mova'bl V brake memberr being capable of swinging; andflsliding;radially, an ac'tuatingymembe' i mounted to swing :onthe "axis of {the sa movable brake member andv independen thereof, the said actuating 7 member having a slot, a pin heldon the movable brakefmem her and extending through cthe Sait1;-sldti spring interposed between the said pin, an thesaid actuating member-5 and" strikm member on closingtlie doorp V I 7. A- door butler," comprising] a frictions, brake havmg a fixed-segmentalbrake mema tree of thesaii l, fixed brake member an adapted to engage ythel same; the movabl brake me'mberbeirigrapable of swingin and slidingradially, an actuating membe mounted to swing on the axisz lol"thejsaitlt movable brake 1 member. and independently c thereof, the saidQactuatingQ member being approximately L (shape and h'aving i a 7 slot, 7 spring pressing theisaid actuating member,

a held on the s id movable'bralrejmema 3 ber and extending through the'said slot, a spring interposed between the said pin and the said actuating member, and striking means adapted to engage the said actuating member on closing the door.

8. A door buffer provided with a fixed segmental brake member having beveled sides, an approximately U-shaped movable brake member mounted to swing and to slide radially, the free ends of the said movable brake member being 7 beveled and adapted to engage the beveled edges of the said fixed brake member, and actuating means connected with the said movable brake member to impart a swinging motion thereto on gently closing the door and to impart a swinging and sliding motion to the said movable brake member to frictionally engage the latter with the said fixed brake member on slamming the door.

In testimony whereof I have signed my name to this specification in the presence of 7 Vvitnesses E. BOWEN, 'F. POSTMA.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

